diff --git a/camera/CameraParameters.cpp b/camera/CameraParameters.cpp
index fd91bf2..d10f2e5 100644
--- a/camera/CameraParameters.cpp
+++ b/camera/CameraParameters.cpp
@@ -90,6 +90,7 @@
 const char CameraParameters::KEY_VIDEO_SNAPSHOT_SUPPORTED[] = "video-snapshot-supported";
 const char CameraParameters::KEY_VIDEO_STABILIZATION[] = "video-stabilization";
 const char CameraParameters::KEY_VIDEO_STABILIZATION_SUPPORTED[] = "video-stabilization-supported";
+const char CameraParameters::KEY_LIGHTFX[] = "light-fx";
 
 const char CameraParameters::TRUE[] = "true";
 const char CameraParameters::FALSE[] = "false";
@@ -167,6 +168,10 @@
 const char CameraParameters::FOCUS_MODE_CONTINUOUS_VIDEO[] = "continuous-video";
 const char CameraParameters::FOCUS_MODE_CONTINUOUS_PICTURE[] = "continuous-picture";
 
+// Values for light fx settings
+const char CameraParameters::LIGHTFX_LOWLIGHT[] = "low-light";
+const char CameraParameters::LIGHTFX_HDR[] = "high-dynamic-range";
+
 CameraParameters::CameraParameters()
                 : mMap()
 {
diff --git a/include/camera/CameraParameters.h b/include/camera/CameraParameters.h
index 5540d32..d521543 100644
--- a/include/camera/CameraParameters.h
+++ b/include/camera/CameraParameters.h
@@ -525,6 +525,10 @@
     // stream and record stabilized videos.
     static const char KEY_VIDEO_STABILIZATION_SUPPORTED[];
 
+    // Supported modes for special effects with light.
+    // Example values: "lowlight,hdr".
+    static const char KEY_LIGHTFX[];
+
     // Value for KEY_ZOOM_SUPPORTED or KEY_SMOOTH_ZOOM_SUPPORTED.
     static const char TRUE[];
     static const char FALSE[];
@@ -664,6 +668,12 @@
     // other modes.
     static const char FOCUS_MODE_CONTINUOUS_PICTURE[];
 
+    // Values for light special effects
+    // Low-light enhancement mode
+    static const char LIGHTFX_LOWLIGHT[];
+    // High-dynamic range mode
+    static const char LIGHTFX_HDR[];
+
 private:
     DefaultKeyedVector<String8,String8>    mMap;
 };
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
index 1ddf775..756e76a 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
+++ b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
@@ -513,8 +513,6 @@
                     }
                 }
             } else if (what == Renderer::kWhatFlushComplete) {
-                CHECK_EQ(what, (int32_t)Renderer::kWhatFlushComplete);
-
                 int32_t audio;
                 CHECK(msg->findInt32("audio", &audio));
 
diff --git a/services/audioflinger/AudioMixer.cpp b/services/audioflinger/AudioMixer.cpp
index ab75dd0..1f13625 100644
--- a/services/audioflinger/AudioMixer.cpp
+++ b/services/audioflinger/AudioMixer.cpp
@@ -108,6 +108,8 @@
 
     LocalClock lc;
 
+    pthread_once(&sOnceControl, &sInitRoutine);
+
     mState.enabledTracks= 0;
     mState.needsChanged = 0;
     mState.frameCount   = frameCount;
@@ -121,8 +123,6 @@
     // and mTrackNames is initially 0.  However, leave it here until that's verified.
     track_t* t = mState.tracks;
     for (unsigned i=0 ; i < MAX_NUM_TRACKS ; i++) {
-        // FIXME redundant per track
-        t->localTimeFreq = lc.getLocalFreq();
         t->resampler = NULL;
         t->downmixerBufferProvider = NULL;
         t++;
@@ -192,7 +192,6 @@
         t->sessionId = sessionId;
         // setBufferProvider(name, AudioBufferProvider *) is required before enable(name)
         t->bufferProvider = NULL;
-        t->downmixerBufferProvider = NULL;
         t->buffer.raw = NULL;
         // no initialization needed
         // t->buffer.frameCount
@@ -203,7 +202,7 @@
         // setParameter(name, TRACK, MAIN_BUFFER, mixBuffer) is required before enable(name)
         t->mainBuffer = NULL;
         t->auxBuffer = NULL;
-        // see t->localTimeFreq in constructor above
+        t->downmixerBufferProvider = NULL;
 
         status_t status = initTrackDownmix(&mState.tracks[n], n, channelMask);
         if (status == OK) {
@@ -544,7 +543,7 @@
                         // the resampler sees the number of channels after the downmixer, if any
                         downmixerBufferProvider != NULL ? MAX_NUM_CHANNELS : channelCount,
                         devSampleRate);
-                resampler->setLocalTimeFreq(localTimeFreq);
+                resampler->setLocalTimeFreq(sLocalTimeFreq);
             }
             return true;
         }
@@ -1411,7 +1410,16 @@
     if (AudioBufferProvider::kInvalidPTS == basePTS)
         return AudioBufferProvider::kInvalidPTS;
 
-    return basePTS + ((outputFrameIndex * t.localTimeFreq) / t.sampleRate);
+    return basePTS + ((outputFrameIndex * sLocalTimeFreq) / t.sampleRate);
+}
+
+/*static*/ uint64_t AudioMixer::sLocalTimeFreq;
+/*static*/ pthread_once_t AudioMixer::sOnceControl = PTHREAD_ONCE_INIT;
+
+/*static*/ void AudioMixer::sInitRoutine()
+{
+    LocalClock lc;
+    sLocalTimeFreq = lc.getLocalFreq();
 }
 
 // ----------------------------------------------------------------------------
diff --git a/services/audioflinger/AudioMixer.h b/services/audioflinger/AudioMixer.h
index 6333357..dc468ff 100644
--- a/services/audioflinger/AudioMixer.h
+++ b/services/audioflinger/AudioMixer.h
@@ -188,12 +188,12 @@
 
         // 16-byte boundary
 
-        uint64_t    localTimeFreq;
-
         DownmixerBufferProvider* downmixerBufferProvider; // 4 bytes
 
         int32_t     sessionId;
 
+        int32_t     padding[2];
+
         // 16-byte boundary
 
         bool        setResampler(uint32_t sampleRate, uint32_t devSampleRate);
@@ -274,6 +274,10 @@
 
     static int64_t calculateOutputPTS(const track_t& t, int64_t basePTS,
                                       int outputFrameIndex);
+
+    static uint64_t         sLocalTimeFreq;
+    static pthread_once_t   sOnceControl;
+    static void             sInitRoutine();
 };
 
 // ----------------------------------------------------------------------------
diff --git a/services/camera/libcameraservice/camera2/Parameters.cpp b/services/camera/libcameraservice/camera2/Parameters.cpp
index fd44a3e..111fd1b 100644
--- a/services/camera/libcameraservice/camera2/Parameters.cpp
+++ b/services/camera/libcameraservice/camera2/Parameters.cpp
@@ -1444,6 +1444,10 @@
         ALOGE("%s: Video stabilization not supported", __FUNCTION__);
     }
 
+    // LIGHTFX
+    validatedParams.lightFx = lightFxStringToEnum(
+        newParams.get(CameraParameters::KEY_LIGHTFX));
+
     /** Update internal parameters */
 
     *this = validatedParams;
@@ -1927,6 +1931,18 @@
     }
 }
 
+Parameters::Parameters::lightFxMode_t Parameters::lightFxStringToEnum(
+        const char *lightFxMode) {
+    return
+        !lightFxMode ?
+            Parameters::LIGHTFX_NONE :
+        !strcmp(lightFxMode, CameraParameters::LIGHTFX_LOWLIGHT) ?
+            Parameters::LIGHTFX_LOWLIGHT :
+        !strcmp(lightFxMode, CameraParameters::LIGHTFX_HDR) ?
+            Parameters::LIGHTFX_HDR :
+        Parameters::LIGHTFX_NONE;
+}
+
 status_t Parameters::parseAreas(const char *areasCStr,
         Vector<Parameters::Area> *areas) {
     static const size_t NUM_FIELDS = 5;
diff --git a/services/camera/libcameraservice/camera2/Parameters.h b/services/camera/libcameraservice/camera2/Parameters.h
index c587ca5..cf2bb73 100644
--- a/services/camera/libcameraservice/camera2/Parameters.h
+++ b/services/camera/libcameraservice/camera2/Parameters.h
@@ -240,6 +240,8 @@
     static const char* flashModeEnumToString(flashMode_t flashMode);
     static focusMode_t focusModeStringToEnum(const char *focusMode);
     static const char* focusModeEnumToString(focusMode_t focusMode);
+    static lightFxMode_t lightFxStringToEnum(const char *lightFxMode);
+
     static status_t parseAreas(const char *areasCStr,
             Vector<Area> *areas);
     static status_t validateAreas(const Vector<Area> &areas,